package com.edevp.common.core.util;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * ${DESCRIPTION}
 *
 * @author Lean
 * @create 2019-03-05 8:35 PM
 **/
@Component
public class ServiceHelper implements ApplicationContextAware {

	private static ApplicationContext applicationContext;


	public static <T> T getBean(Class<T> clz) {
		try{
			return getApplicationContext().getBean(clz);
		}catch(NoSuchBeanDefinitionException e){
			//			e.printStackTrace();
		}
		return null;
	}

	//获取applicationContext
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	//通过name获取 Bean.
	public static Object getBean(String name){
		return getApplicationContext().getBean(name);
	}

	//通过name,以及Clazz返回指定的Bean
	public static <T> T getBean(String name,Class<T> clazz){
		return getApplicationContext().getBean(name, clazz);
	}

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		//		System.out.println("---------setApplicationContext-----------");
		if(ServiceHelper.applicationContext == null) {
			ServiceHelper.applicationContext = applicationContext;
		}
	}
}
